"60 Years of Spark"60 Years of Spark celebrates Corvettes 60th Anniversary by displaying a 2013 60th Anniversary Edition 427 Convertible. I saw this very popular model in my last tour of the Corvette Assembly Plant, and their production numbers indicate that about 20% of production this model year are 427 Convertibles. I chose to place this car in front of a wall advertising an early designed ad for Champion Spark Plugs since the colors work well together and this car